IBASE MB839 - Manual (Page 40)

APPENDIX
34 MB839 Series User’s Manual
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the
service required. The following table shows the IRQ used by the devices
on board.
Level Function
IRQ 0 System timer
IRQ 1 Standard PS/2 Keyboard
IRQ 3 Communications Port (COM2)
IRQ 4 Communications Port (COM1)
IRQ 5 Communications Port (COM3)
IRQ 7 Communications Port (COM4)
IRQ 8 System CMOS/real time clock
IRQ 11 Intel(R) N10/ICH7 Family SMBus Controller -
27DA
IRQ 12 Microsoft PS/2 Mouse
IRQ 13 Numeric data processor
IRQ 16 Intel(R) N10/ICH7 Family USB Universal Host
Controller - 27CB
IRQ 18 Intel(R) N10/ICH7 Family USB Universal Host
Controller - 27CA
IRQ 19 Intel(R) N10/ICH7 Family Serial ATA Storage
Controller - 27C0
IRQ 19 Intel(R) N10/ICH7 Family USB Universal Host
Controller - 27C9
IRQ 22 High Definition Audio Controller
IRQ 23 Intel(R) N10/ICH7 Family USB2 Enhanced Host
Controller - 27CC
IRQ 23 Intel(R) N10/ICH7 Family USB Universal Host
Controller - 27C8
IRQ 4294967290 Intel(R) 82583V Gigabit Network Connection
IRQ 4294967291 Intel(R) 82583V Gigabit Network Connection #2
IRQ 4294967292 Intel(R) Graphics Media Accelerator 3600 Series
IRQ 4294967293 Intel(R) N10/ICH7 Family PCI Express Root Port -
27D2
IRQ 4294967294 Intel(R) N10/ICH7 Family PCI Express Root Port -
27D0